Screen anti-candid photograph equipment based on frequency difference

Screen anti-candid photograph equipment based on frequency difference

  • CN 106,407,827 B
  • Filed: 11/24/2016
  • Issued: 07/27/2021
  • Est. Priority Date: 11/24/2016
  • Status: Active Grant
First Claim
Patent Images

1. A screen anti-candid camera device based on frequency difference is characterized in that:

  • the device has a controllable display window, the controllable display window is divided into N different areas, in the N areas, the update frequency of at least one area is not equal to the update frequency of other areas, and the device comprises;

    f. of1

    f<

    f2Wherein f is the update frequency of all the areas divided by the controllable display window, f1Identifying the frequency, f, for the human eye2Is the camera shutter frequency, N is not less than 2;

    the screen anti-candid device is matched with a display tool for use, wherein the matched use refers to that the screen anti-candid device is placed in front of a display screen of the display tool, the size of the controllable display window is not smaller than that of the display screen of the display tool, and the controllable display window is used as a protective window blocked in front of the display screen;

    the dividing of the controllable display window into N different regions is performed according to the following rule;

    dividing the controllable display window into M unit blocks in any mode, wherein M is not less than N;

    a region including at least one unit block, each unit block being included in the region, and any one unit block being included in only one region;

    setting a controlled window in the cell block, wherein the controlled window can be opened or closed according to a set frequency;

    the set frequency is the update frequency of the area where the cell block is located.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×